וְהִקְרִ֥יב אֹתָ֖הּ הַכֹּהֵ֑ן וְהֶֽעֱמִדָ֖הּ לִפְנֵ֥י יְהוָֽה׃
Et le pontife la fera approcher, et il la placera en présence du Seigneur.
Tosefta Sotah
They do not give [the bitter waters] to two suspected adulteresses to drink at one time, so that the heart of one will not be strengthened by the other. Rabbi Yehuda says, it is not for that reason. Rather, it is because of what it says (Num. 5:16), "The Kohen shall bring her close [and stand her before Hashem]." He brings her close, and he does not bring two close.